DNA polymerases need a primer oligonucleotide (RNA or DNA) - their substrates are an existing 3'-OH group and a dNTP. The primase however is a typical RNA polymerase, capable of initiating polynucleotide synthesis de novo by positioning a complementary ribonucleoside 5'-triphosphate opposite its complementary DNA base.
Alison Schapker. Alison Schapker is an American television writer and producer. She is well known for her work on the ABC espionage series Alias and for the FOX science-fiction series Fringe.
Sarah Huckabee Sanders has become the face of the White House's bungled, contradictory account of President Trump's firing of FBI Director James Comey, and proved to be just as unreliable and obfuscatory in the briefing room as her boss Sean Spicer.